This commit relocates filter_plugings to lib_utils,
changes the namespacing to prevent unintended use of
older versions that may be present in filter_plugins/
directory on existing installs.

Add lib_utils to meta depends for roles

Also consolidate some plugins into lib_utils from
various other areas.

Update rpm spec, obsolete plugin rpms.

All of these roles call the openshift_facts module but didn't include
the role in their dependencies which can lead to errors in Ansible 2.4.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1524102

This is a part of the etcd_ like role consolidationi into an action-based role.
As part of the consilidation some roles have been removed and some replaced by
include_role module. Resulting in reorder and shift of role dependencies
from a role into a play.

- introduce block and simplify when conditions
- introduce config.yml so the self-standing etcd role can be run (e.g. to test etcd cluster deployment)
- remove empty task files
- skip dependency on openshift_etcd_ca
- replace cert paths with their appropriate variables

* Ansible systemd module used in place of service module
* Refactored command tasks which are no longer necessary
* Applying rules from openshift-ansible Best Practices Guide